describe the different kinds of selectors code example

Example 1: css selectors

* {
color: pink;
}
h1, h2 {Select all h1 and h2}
li a {select all anchor inside a list}
h1 + p {select all p placed after an h1}
div > li {all li directly in a div}

Example 2: what is a css selector

h1 {
  color: red;
}

In this CSS code example that sets the color of all h1s to red 
the "h1" is the selctor because we are applying this style to 
the h1s.